joining us is republican campaign consultant, alex castellanos and bill burton, senior strategist for the leading pro obama super pac. alex, with all the criticism, wouldn't you expect the romney campaign to produce their own evidence to prove the numbers add up? right now, people are wondering where that 20% figure came from, whether they came up with the number for policy reasons or political ones. >> well, you know, this has devolved into my study's bigger than your study. >> in some cases my blog post is bigger than your study. >> yeah. of course, president obama had tons of studies that explain how his stimulus would actually stimulate, it didn't. how his health care plan would reduce health care costs. it hasn't. every major economic decision this country has made for the past 40 years, we had study upon study and guess what, we're $16 trillion in debt and you can't find a job with the hubble telescope. these studies are not the end-all, be-all. the particular study attacking romney's tax cut does not account for growth. >> bill, what about that? the six studies, so-called, does